Not a lot of Americans care, unfortunitly. There's plenty who don't care about fact checking, or even facts. They take the broadcaster's word for it, and to back it up they cite to themselves Faux New's slogan, "Fair and Balanced".
Many viewers who see it as the only news source worth watch, because it's "fair and balanced" and because everyone else is part of the consiracy-ridden "lame-stream/liberal media" (you don't agree with them, then you're part of the mainstream, liberal media who's out to smear good, hard-working, do-no-wrong Republican politicans), means you'll always have a view-base which is like dollar signs to advertisers.
Being owned by Ruport Merdock (I know I spelt it wrong) doesn't hurt either.
OT:
http://www.huffingtonpost.com/2011/11/21/fox-news-viewers-less-informed-people-fairleigh-dickinson_n_1106305.html
Something worth checking out for anyone who doesn't already know the story and like to hear about Faux News.
EDIT:
Thinking about it know, I'm really curious about what an American presidential election would look like if Dumb Fux News was replaced with a conservative version of a serious news source like CNN. We might actually get somewhere in a civilized manner with real candidates.